Reception apparatus and method, and transmission apparatus and method

ABSTRACT

The present disclosure relates to a reception apparatus and method, a transmission apparatus and method, and a program, capable of obtaining desired communication quality. Under the control of a central control unit, a tactile signal generation unit generates a tactile signal of a necessary number. Under the control of the central control unit, a header generation unit generates header information including the presence or absence of the tactile signal (that is, information indicating whether or not the tactile signal is to be used for each of vibration units as information associated with the vibration unit that uses the tactile signal), the delay amount, and the magnitude. A signal coupling unit adds header information to each of the tactile signals from the tactile signal generation unit, and performs time-division multiplexing on each of the tactile signals to which the header information has been added. The present disclosure can be applied to a tactile presentation system that vibrates a wearable reception apparatus including the vibration unit, for example.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Phase of International PatentApplication No. PCT/JP2017/033797 filed on Sep. 20, 2017, which claimspriority benefit of Japanese Patent Application No. JP 2016-196385 filedin the Japan Patent Office on Oct. 4, 2016. Each of the above-referencedapplications is hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a reception apparatus and method, atransmission apparatus and method, and a program, and in particular, toa reception apparatus and method, a transmission apparatus and method,and a program capable of obtaining desired communication quality.

BACKGROUND ART

Conventionally, there is a device that vibrates to give a user tactilesensations (refer to Patent Document 1).

CITATION LIST Patent Document

Patent Document 1: Japanese Patent Application Laid-Open No. 2011-59821

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In a case where a wearable presentation device such as a jacket is used,connecting the device to a system main body with a wired cable woulddegrade the degree of freedom and lower its experiential value.Therefore, tactile signals for presentation need to be prepared in thepresentation device in the jacket or need to be transmitted to thepresentation device from the system main body by using a radio channel.At that time, implementation of tactile presentation toward just a fewlocations in the jacket would be sufficiently managed with the use ofthe existing radio system.

However, in a case where tactile presentation is to be provided to alarge number of locations (ten locations or more) in order to raise theexperiential value, there are problems such as insufficient channels(CH) and deterioration of communication quality just with the existingradio system.

The present disclosure has been made in view of such a situation, andaims to obtain desired communication quality.

Solutions to Problems

A reception apparatus according to an aspect of the present technologyincludes: a vibration unit that performs vibration; a reception unitthat receives a time-division multiplexed signal obtained by performingtime-division multiplexing on a signal obtained by adding a headerincluding description of information associated with a vibration unitthat uses a tactile signal including a waveform of vibration forvibrating the vibration unit, to the tactile signal; a separation unitthat separates the tactile signal and the header from the time-divisionmultiplexed signal received by the reception unit; and a signaladjustment unit that adjusts the tactile signal separated by theseparation unit in accordance with the header separated by theseparation unit, in which the vibration unit performs vibration based onthe tactile signal adjusted by the signal adjustment unit.

The information associated with the vibration unit that uses the tactilesignal is information indicating whether or not the vibration unit is touse the tactile signal for each of the vibration units.

The signal adjustment unit can perform processing of muting the tactilesignal separated by the separation unit in a case where the headerindicates that the vibration unit is not to use the tactile signal.

The header includes description of gain information and delayinformation for each of the vibration units.

The header includes description of a gain initial value and slope foreach of the vibration units.

The Information associated with the vibration unit that uses the tactilesignal is information for identifying a plurality of vibration unitsthat uses the tactile signal.

The header includes description of a gain initial value and the slopefor each of the plurality of vibration units.

The Information associated with the vibration unit that uses the tactilesignal is information for identifying a group including the plurality ofvibration units that uses the tactile signal.

The header includes description of a position and time of vibration. Thereception apparatus further includes a gain calculation unit thatanalyzes a header separated by the separation unit and refers to a tableso as to obtain a gain change between the vibration units belonging tothe group, and the signal adjustment unit can adjust the tactile signalseparated by the separation unit in accordance with the header separatedby the separation unit and the gain change calculated by the gaincalculation unit.

The reception apparatus is formed as a wearable apparatus to be worn bya user.

A reception method according to an aspect of the present technology is areception method including executing, by a reception apparatus:receiving a time-division multiplexed signal obtained by performingtime-division multiplexing on a signal obtained by adding a headerincluding description of information associated with a vibration unitthat uses a tactile signal including a waveform of vibration forvibrating the vibration unit that performs vibration, to the tactilesignal; separating the tactile signal and the header from thetime-division multiplexed signal received; adjusting the separatedtactile signal in accordance with the separated header; and performingvibration based on the adjusted tactile signal.

A program according to an aspect of the present technology causes acomputer to function as: a reception unit that receives a time-divisionmultiplexed signal obtained by performing time-division multiplexing ona signal obtained by adding a header including description ofinformation associated with a vibration unit that uses a tactile signalincluding a waveform of vibration for vibrating the vibration unit thatperforms vibration, to the tactile signal; a separation unit thatseparates the tactile signal and the header from the time-divisionmultiplexed signal received by the reception unit; a signal adjustmentunit that adjusts the tactile signal separated by the separation unit inaccordance with the header separated by the separation unit; and thevibration unit that performs vibration based on the tactile signaladjusted by the signal adjustment unit.

A transmission apparatus according to another aspect of the presenttechnology includes: a tactile signal generation unit that generates atactile signal including a waveform of vibration for vibrating avibration unit; a header generation unit that generates a headerincluding description of information associated with the vibration unitthat uses a tactile signal generated by the tactile signal generationunit; a time-division multiplexing unit that performs time-divisionmultiplexing on the tactile signal generated by the tactile signalgeneration unit and to which the header generated by the headergeneration unit has been added; and a transmission unit that transmitsthe signal time-division multiplexed by the time-division multiplexingunit.

The information associated with the vibration unit that uses the tactilesignal is information indicating whether or not the vibration unit is touse the tactile signal for each of the vibration units.

The header includes description of gain information and delayinformation for each of the vibration units.

The information associated with the vibration unit that uses the tactilesignal is information associated with operation of the plurality ofvibration units that uses the tactile signal.

The Information associated with the vibration unit that uses the tactilesignal is information for identifying a group including the plurality ofvibration units that uses the tactile signal.

The reception apparatus provided with the vibration unit is formed as awearable apparatus to be worn by a user.

A transmission method according to another aspect of the presenttechnology includes executing, by a transmission apparatus: generating atactile signal including a waveform of vibration for vibrating avibration unit; generating a header including description of informationassociated with the vibration unit that uses the generated tactilesignal; performing time-division multiplexing on the tactile signalgenerated by the tactile signal generation unit and to which the headergenerated by the header generation unit has been added; and transmittingthe time-division multiplexed signal.

A program according to another aspect of the present technology causes acomputer to function as: a tactile signal generation unit that generatesa tactile signal including a waveform of vibration for vibrating avibration unit; a header generation unit that generates a headerincluding description of information associated with a vibration unitthat uses the tactile signal generated by the tactile signal generationunit; a time-division multiplexing unit that performs time-divisionmultiplexing on the tactile signal generated by the tactile signalgeneration unit and to which the header generated by the headergeneration unit has been added; and a transmission unit that transmitsthe signal time-division multiplexed by the time-division multiplexingunit.

In one aspect of the present technology, a time-division multiplexedsignal obtained by performing time-division multiplexing on a signalobtained by adding a header including description of informationassociated with a vibration unit that uses a tactile signal including awaveform of vibration for vibrating the vibration unit that performsvibration, to the tactile signal, is received. Subsequently, the tactilesignal and the header are separated from the time-division multiplexedsignal received, the separated tactile signal is adjusted in accordancewith the separated header, and vibration based on the adjusted tactilesignal is performed.

In another aspect of the present technology, a tactile signal includinga waveform of vibration for vibrating a vibration unit is generated, anda header including description of information associated with thevibration unit that uses the generated tactile signal is generated.Subsequently, the tactile signal to which the generated header has beenadded is time-division multiplexed, and the time-division multiplexedsignal is transmitted.

Effects of the Invention

According to the present technology, desired communication quality canbe obtained, in particular.

Note that effects described in the present description are provided forpurposes of exemplary illustration and effects of the present technologyare not intended to be limited to the effects described in the presentdescription, and still other additional effects may also becontemplated.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram illustrating an exemplary configuration of a tactilepresentation system according to the present technology.

FIG. 2 is a view illustrating a configuration example of an appearanceof a wearable reception apparatus.

FIG. 3 is a diagram illustrating a configuration example of atransmission apparatus and a wearable reception apparatus of the tactilepresentation system.

FIG. 4 is a diagram illustrating a packet configuration exampleincluding header information.

FIG. 5 is a block diagram illustrating an exemplary configuration of atransmission apparatus.

FIG. 6 is a flowchart illustrating transmission processing of atransmission apparatus.

FIG. 7 is a block diagram illustrating an exemplary configuration of awearable reception apparatus.

FIG. 8 is a block diagram illustrating an exemplary configuration of thesignal adjustment unit.

FIG. 9 is a flowchart illustrating reception processing of a wearablereception apparatus.

FIG. 10 is a diagram illustrating an example of a time-divisionmultiplexing operation on a transmission side.

FIG. 11 is a diagram illustrating an example of header information.

FIG. 12 is a diagram illustrating an example of time-divisionmultiplexing operation in which time shift management has beenperformed.

FIG. 13 is a diagram illustrating an example of time-divisionmultiplexing operation in which gain (amplitude) management has beenperformed.

FIG. 14 is a diagram illustrating an example of time-divisionmultiplexing operation using a plurality of channels (Chs).

FIG. 15 is a diagram illustrating another transmission method (1).

FIG. 16 is a diagram illustrating a packet configuration exampleaccording to the transmission method (1) in FIG. 15.

FIG. 17 is a diagram illustrating another transmission method (2).

FIG. 18 is a diagram illustrating a packet configuration exampleaccording to the transmission method (2) in FIG. 17.

FIG. 19 is a diagram illustrating another transmission method (3).

FIG. 20 is a diagram illustrating a packet configuration exampleaccording to the transmission method (3) in FIG. 19.

FIG. 21 is a diagram illustrating a configuration example of ademultiplexer and a signal adjustment unit of a wearable receptionapparatus in a case of another transmission method.

FIG. 22 is a block diagram illustrating an example of a personalcomputer.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present disclosure (hereinafter,embodiment(s)) will be described. Note that description will bepresented in the following order.

1. First Embodiment

2. Second Embodiment

3. Third Embodiment

1. First Embodiment

<Configuration Example of Tactile Presentation System>

FIG. 1 is a diagram illustrating an exemplary configuration of a tactilepresentation system according to the present technology. Note that thetactile presentation represents giving vibration. Accordingly,hereinafter, vibration is also referred to as tactile presentation.

In the example of FIG. 1, a tactile presentation system 1 includes atransmission apparatus 11, wearable reception apparatuses 12 a to 12 oworn by users 13 a to 13 o, and a reception area 14. Note that thewearable reception apparatuses 12 a to 12 o are referred to as awearable reception apparatus 12 unless distinction is needed inparticular, and the users 13 a to 13 o are appropriately referred to asthe user 13 unless distinction is needed in particular.

The transmission apparatus 11 is configured to be movable, and includesan antenna 21.

The antenna 21 is omnidirectional and transmits a broadcasting signaltoward the reception area 14. Note that the antenna 21 may bedirectional. In this case, the antenna 21 has a video projectionfunction and transmits a specific-area oriented signal toward a specificarea (not illustrated) within the reception area 14 to which a video isprojected by the video projection function.

The wearable reception apparatus 12 is a reception apparatus of a jacket(vest) shape worn by the user 13. The wearable reception apparatus 12receives a signal from the antenna 21 within the reception area 14. Thewearable reception apparatus 12 includes a vibration unit (actuator) 31for vibrating the body of the user 13, and vibrates the body of the user13 in accordance with a signal from the antenna 21.

The user 13 is one of a plurality of users wearing the wearablereception apparatus 12 and is freely moving within the reception area14. The reception area 14 is an area capable of receiving a signal fromthe antenna 21.

FIG. 2 is a view illustrating a configuration example of an appearanceof the wearable reception apparatus 12.

As illustrated in FIG. 2, the wearable reception apparatus 12 is formedwith a wearable jacket, and includes vibration units 31-1R to 31-3R astactile presentation devices, and vibration unit 31-1L to 31-3L providedin left-right pairs on chest to abdominal regions. The vibration units31-1R to 31-3R and the vibration units 31-1L to 31-3L may vibrate at asame timing or may vibrate at different timings, respectively.Furthermore, speakers 32R and 32L are provided on shoulder portions ofthe jacket, whereby the user 13 can receive vibration of the vibrationunits 31-1R to 31-3R and the vibration units 31-1L to 31-3L and soundsfrom the speakers 32R and 32L and can thereby enjoy tactile sensationand sound full of realistic feeling.

Note that the vibration units 31-1R to 31-3R and the vibration units31-1L to 31-3L are referred to as the vibration unit 31 unlessdistinction is needed in particular. While the example of FIG. 2illustrates an exemplary case where number of the vibration unit 31 issix, the actual number of the vibration unit 31 is ten or more, forexample. Note that the number of vibration units 31 is not limited toten or more, and may be any number as long as it is more than one.Additionally, the speakers 32R and 32L will also be referred to as aspeaker 32 unless distinction is needed in particular. Note that forconvenience of explanation, the vibration unit 31 will be simplyreferred to as an actuator in some cases.

FIG. 3 is a diagram illustrating a configuration example of atransmission apparatus and a wearable reception apparatus of the tactilepresentation system.

In the tactile presentation system 1 of FIG. 3, the transmissionapparatus 11 includes the antenna 21, and selects only the signal linethat carries a tactile signal to the vibration units 31-1 to 31-n amongtactile signals 1 to n, and transmits the signal via the antenna 21.

The wearable reception apparatus 12 includes an omnidirectional antenna41, for example. Note that the antenna 41 may have directivity or neednot have directivity, regardless of the presence or absence ofdirectivity on the transmission side. The wearable reception apparatus12 reads the correspondence of the tactile signal received via theantenna 41 to the order of the vibration unit 31, and outputs thetactile signal to the vibration unit 31 corresponding to the number outof the vibration units 31-1 to 31-n.

As described above, in order to transfer the corresponding numberbetween the transmission side and the reception side, the tactilepresentation system 1 transmits header information before transmissionof the tactile signal.

FIG. 4 is a diagram illustrating a packet configuration exampleincluding header information. In the packet configuration, a tactilesignal is provided after the header. In the header, it is prescribedsuch that a value (0/1) corresponding to the number of each of thevibration units 31 being “1” means the presence of a tactile signal(this tactile signal is to be used), and the value being “0” means theabsence of the tactile signal (this tactile signal is not to be used).That is, header includes information indicating whether or not to usethe tactile signal for each of the vibration units, as informationassociated with the vibration unit that uses a tactile signal.

<Configuration Example of Transmission Apparatus>

FIG. 5 is a block diagram illustrating an exemplary configuration of atransmission apparatus.

In the example of FIG. 5, the transmission apparatus 11 includes acentral control unit 51, a tactile signal generation unit 52, a headergeneration unit 53, a signal coupling unit 57, and a signal transmissionunit 58.

The central control unit 51 is constituted by a CPU and the like, forexample, and controls generation of tactile signals by the tactilesignal generation unit 52, header generation by the header generationunit 53 and the like on the basis of the way of vibrating the vibrationunit 31 on the basis of an operation signal from an operation unit (notillustrated) from the user. For example, the central control unit 51issues an instruction to the tactile signal generation unit 52indicating “outputting a tactile signal of pattern A to the vibrationunit 31-1R”. While the following description will use this instructionmethod, the method of instructing the tactile signal generation unit 52by the central control unit 51 can include “a ball hit”, for example. Inthis case, the tactile signal generation unit 52 processes whichvibration unit 31 is to be vibrated. At that time, the informationassociated with the vibration unit 31 to be used is logicallytransmitted from the tactile signal generation unit 52 to the headergeneration unit 53.

Note that, as will be described in detail later, for example, in a casewhere an identical tactile signal is output to the vibration unit 31-1and the vibration unit 31-2, a tactile signal for the vibration unit31-1 is to be generated and a tactile signal for the vibration unit 31-2is not to be generated, and instead, the use of the vibration unit 31-2is set to 1 in the header of the tactile signal for the vibration unit31-1. Furthermore, in a case where the tactile signal for the vibrationunit 31-3 is different from the tactile signal of the vibration unit31-1 merely in gain, the tactile signal for the vibration unit 31-3 isnot to be generated and instead, the use of the vibration unit 31-3 isset to 1 in the header of the tactile signal for the vibration unit 31-1with insertion of a gain value, or the like. In this manner, the centralcontrol unit 51 comprehensively controls individual portions of thetransmission apparatus 11.

Under the control of the central control unit 51, the tactile signalgeneration unit 52 generates a tactile signal of a necessary number, andoutputs the generated tactile signal to the signal coupling unit 57,individually. Note that the tactile signal does not indicate vibrationof all the vibration units 31 and there are cases where 0 istransmitted, or the signal can be a discrete signal as well.

Under the control of the central control unit 51, the header generationunit 53 generates header information including the presence or absenceof a tactile signal (that is, information indicating whether or not atactile signal is to be used for each of vibration units), the delayamount, and the magnitude, and outputs the generated header informationto the signal coupling unit 57.

The signal coupling unit 57 adds the header information to each of thetactile signals from the tactile signal generation unit 52, and performstime-division multiplexing on each of the tactile signals from thetactile signal generation unit 52 to which header information has beenadded, and then, outputs the time-division multiplexed signal to thesignal transmission unit 58. That is, a header is generated in order toperform time-division multiplexing on each of tactile signals from thetactile signal generation unit 52.

The signal transmission unit 58 transmits the signal time-divisionmultiplexed by the signal coupling unit 57 as a radio signal via theantenna 21.

<Example of Operation of Transmission Apparatus>

Next, transmission processing of the transmission apparatus 11 will bedescribed with reference to FIG. 6.

In step S11, under the control of the central control unit 51, thetactile signal generation unit 52 generates a tactile signal of anecessary number, and outputs the generated tactile signal to the signalcoupling unit 57.

In step S12, under the control of the central control unit 51, theheader generation unit 53 generates header information including thepresence or absence of a tactile signal, the delay amount, and themagnitude, and outputs the generated header information to the signalcoupling unit 57.

In step S13, the signal coupling unit 57 adds header information fromthe header generation unit 53 to each of tactile signals from thetactile signal generation unit 52, respectively, and time-divisionmultiplexes each of the tactile signals to which the header informationhas been added, and then, outputs the time-division multiplexed signalto the signal transmission unit 58.

In step S14, the signal transmission unit 58 transmits the signaltime-division multiplexed by the signal coupling unit 57 as a radiosignal via the antenna 21.

<Exemplary Configuration of Reception Apparatus>

FIG. 7 is a block diagram illustrating an exemplary configuration of areception apparatus.

In the example of FIG. 7, the wearable reception apparatus 12 includes areception unit 71, a separation unit 72, a demultiplexer 73, signaladjustment units 74-1 to 74-n, and vibration units 31-1 to 31-n.

The reception unit 71 receives the radio signal (time-divisionmultiplexed signal) via the antenna 41, and outputs the received radiosignal to the separation unit 72. The separation unit 72 separates theheader and the tactile signal from the signal from the reception unit71, outputs the separated header to the demultiplexer 73, and outputsthe separated tactile signal to each of the signal adjustment units 74-1to 74-n.

The demultiplexer 73 extracts the header information of each of tactilesignals corresponding to 1 to n from the header and outputs theextracted information to each of the signal adjustment units 74-1 to74-n of the corresponding number. The signal adjustment units 74-1 to74-n perform signal adjustment such as mute, delay, gain, or the like,on the basis of the corresponding header information from thedemultiplexer 73, and output the tactile signals subjected to individualadjustments to the vibration units 31-1 to 31-n of correspondingnumbers. Correspondingly, the vibration units 31-1 to 31-n vibrate onthe basis of the tactile signal.

Note that, hereinafter, the signal adjustment units 74-1 to 74-n will bereferred to as a signal adjustment unit 74 unless distinction is neededin particular.

FIG. 8 is a block diagram illustrating an exemplary configuration of thesignal adjustment unit 74.

In the example of FIG. 8, the signal adjustment unit 74 corresponds toone vibration unit 31, and includes a muting unit 81, a delay unit 82,and a gain processing unit 83.

The muting unit 81 mutes the tactile signal in accordance with theheader information corresponding to one vibration unit 31 transmittedfrom the demultiplexer 73 and outputs the tactile signal to the delayunit 82. That is, the muting unit 81 mutes the tactile signal when thevibration unit is not to use the tactile signal. The delay unit 82delays the tactile signal in accordance with the header information fromthe demultiplexer 73 and outputs the tactile signal to the gainprocessing unit 83. The gain processing unit 83 applies gain on thetactile signal in accordance with the header information from thedemultiplexer 73 and outputs the tactile signal to the vibration unit31.

<Operation Example of Reception Apparatus>

Next, reception processing of the wearable reception apparatus 12 willbe described with reference to the flowchart of FIG. 9.

In step S31, the reception unit 71 receives a radio signal via theantenna 41, and outputs the received radio signal to the separation unit72.

In step S32, the separation unit 72 separates the header and the tactilesignal from the signal output from the reception unit 71, outputs theseparated header to the demultiplexer 73, and outputs the separatedtactile signal to each of the signal adjustment units 74-1 to 74-n.

In step S33, the demultiplexer 73 extracts the header information ofeach of tactile signals corresponding to 1 to n from the header, andoutputs the extracted information to each of the signal adjustment units74-1 to 74-n of the corresponding number.

In step S34, the signal adjustment units 74-1 to 74-n perform signaladjustment such as mute, delay, gain, or the like, on the basis of thecorresponding header information from the demultiplexer 73, and outputthe tactile signals subjected to individual adjustments to the vibrationunits 31-1 to 31-n of corresponding numbers.

In step S35, the vibration units 31-1 to 31-n vibrate on the basis of atactile signal.

<Example of Time-Division Multiplexing Operation>

FIG. 10 is a diagram illustrating an example of time-divisionmultiplexing operation of a tactile signal <A>, a tactile signal <B>,and a tactile signal <C> on the transmission side. A header is added foreach of the tactile signals.

The tactile signal <A> input to Number 1 has a delay time correspondingto the header added and header information from the header generationunit 53 inserted before the tactile signal <A>. Similarly, the tactilesignal <B> input to Number n and the tactile signal <C> input to Number2 have delay time corresponding to the header added and correspondingheader information inserted before the tactile signal <B> and thetactile signal <C>, individually.

Each of header information at this time is illustrated in FIG. 11. Inthe example of FIG. 11, the bit of the corresponding number is set to“1” in each of the header information of the tactile signal <A>, theheader information of the tactile signal <B>, and the header informationof the tactile signal <C>.

As described above, the example of FIG. 10 has described an example inwhich different tactile signals are transmitted without mutual overlapin time. Here, the present tactile presentation system 1 has a casewhere the tactile signal <a> is simultaneously used by the vibrationunits 31, that is, a plurality of tactile presentation devices. Thiscase can be managed by simultaneously setting a plurality of bits of theheader information to “1”.

While there are cases where a plurality of tactile signals <a> issimultaneously used in the wearable reception apparatus 12, apresentation method of shifting the tactile presentation location (bodypart) is also applicable and thus, the tactile signal <a> is shifted intime to be used on the vibration units 31, in some cases. Note that itis presumed that the time shift is shorter than the duration of thetactile signal <a>. In such a case, it would not be efficient totransmit the tactile signal <a> with a plurality of Chs at a desiredtime shift, and thus, the time shift is to be managed by modifying theheader information.

FIG. 12 is a diagram illustrating an example of time-divisionmultiplexing operation in which time shift management has beenperformed.

In contrast to Number 1, tactile signal <A> of Number 2 is shifted bydelay [x]. On the transmission side, the tactile signal <A> istransmitted just at the timing for Number 1. The header information atthat time also includes information associated with the tactile signal<A> of number 2 already recognized under the same environment, with abit indicating “tactile signal is present” set. The header informationin this state is transmitted including information shifted by delay [x]in association with the bit. For example, as illustrated in a portion ofthe header of FIG. 12, header information of the tactile signal <A> hasdescription of bit “1” and delay “0” for Number 1 with description ofbit “1” and delay “x” for Number 2.

With this configuration, the reception side receives one tactile signal<A> alone, thereby enabling the vibration unit 31 for Number 1 andNumber 2 to be driven with time shifted.

Furthermore, even when Number 1 continues to be driven with the tactilesignal <B> and even when the driving timing overlaps with the tactilesignal <A> corresponding to Number 2, the driving can be managed withone Ch alone as a transmission channel, since the tactile signal <A>corresponding to Number 2 has already been transmitted.

Note that while the example illustrated in FIG. 12 is a case where theidentical tactile signal drives the vibration unit 31 with time shift,the wearable reception apparatus 12 would also have a case where thetactile signal <a> is further utilized by a plurality of vibration units31 with various presentation intensities (vibration amplitude). In thatcase, information associated with the relative presentation intensitywould be added to the header information.

FIG. 13 is a diagram illustrating an example of time-divisionmultiplexing operation in which gain (amplitude) management has beenperformed.

Tactile signal <A> is assigned to Number 1 and tactile signal <A′>(tactile signal being tactile signal <A> with different gain) isassigned to Number 2. Note that the tactile signal <A′> is a tactilesignal being the same signal as the tactile signal <A>, with differencein gain alone. In addition, tactile signal <A′> of Number 2 is shiftedby delay [x]. At this time, the ratio of the tactile signal of Number 2to the signal of Number 1 is provided as gain [y] in the headerinformation, with reference to Number 1 side.

For example, as illustrated in a portion of the header of FIG. 13,header information of the tactile signal <A> has description of bit “1”,delay “0” and gain “1” for Number 1 with description of bit “1”, delay“x”, and gain “y” for Number 2.

With this configuration, the reception side receives one tactile signal<A> alone, thereby enabling the vibration unit 31 of Number 1 to bedriven and enabling the vibration unit 31 of Number 2 to be driven withtime shifted and with varied gain.

In this case also, even when Number 1 continues to be driven with thetactile signal <B> and even when the driving timing overlaps with thetactile signal <A′> corresponding to Number 2, the driving can bemanaged with one Ch alone as a transmission channel since the tactilesignal <A′> corresponding to Number 2 has already been transmitted.

Note that there is no need to define the header information on the basisof Number 1 located at the head, in both delay and gain. Furthermore,“0” need not be included in the delay of the header information, and “1”need not be included in the gain. Still, for example, in order toeliminate the need to provide an extra delay circuit and eliminate theneed for an extra signal amplitude dynamic range, namely, from theviewpoint of actual implementation, it would be desirable to set to“Delay: 0” and “Gain: 1”.

The above has described an example in which the tactile signals aretransmitted without mutual overlap in time in the transmission-sideoutput stage as well. That is, the radio transmission system is capableof transmitting a tactile signal simply by using one frequency Ch alone.

As opposed to this, the present tactile presentation system 1 also has acase where another tactile signal may be transmitted while one tactilesignal is being transmitted even though timings of transmission of thetactile signals are not the same. This case would not be manageable byone frequency Ch, and thus, it is necessary to use a plurality offrequency Chs. It is, however, still possible to reduce the frequencyChs to use by performing time-division multiplexing on the tactilesignal without providing the same number of frequency Chs as theplurality of vibration units 31.

FIG. 14 is a diagram illustrating an example of a time-divisionmultiplexing operation using a plurality of Chs.

Tactile signals <A> to <F> are transmitted from Numbers 1, 2, and 3.Specifically, <A> and <D> are transmitted from Number 1, <B> and <E>from Number 2, and <C> and <F> from Number 3. As illustrated in FIG. 14,overlapping of tactile signals occurs in each of tactile signals <A> and<B>, tactile signals <B> and <C>, and tactile signals <D> and <E>.However, there is no simultaneous overlapping of three tactile signals,and thus, frequency Ch to be used can be managed by two Chs.

Note that, strictly speaking, each of the tactile signals <B>, <D> and<F> does not overlap with the previous tactile signal. Still, the signalis transmitted using another frequency Ch because of an occurrence ofoverlap due to insertion of the header.

Accordingly, the tactile signal <A> is transmitted as transmission-sideoutput 1, the tactile signal <B> is transmitted as transmission-sideoutput 2 since it overlaps with the tactile signal <A>, and the tactilesignal <C> is transmitted as the transmission-side output 1 since itoverlaps with the tactile signal <B>. Similarly, the tactile signal <D>is transmitted as the transmission-side output 2 since its headerportion overlaps with the tactile signal <C>, and the tactile signal <E>is transmitted as the transmission-side output 1 since it overlaps withthe tactile signal <D>, and the tactile signal <F> is transmitted as thetransmission-side output 2 since its header portion overlaps with thetactile signal <E>.

With this operation, on the wearable reception apparatus 12, the tactilesignals <A>, <C> and <E> are received as reception-side input 1, and thetactile signals <B>, <D>, and <F> are received as reception-side input2, and the vibration unit 31 vibrates such that <A> and <D> vibrates asNumber 1, <B> and <E> as Number 2, and <C> and <F> as Number 3.

<Parameter Design>

Note that an example of the requirement for the header in the tactilepresentation system will be described.

An exemplary item to be affected by header insertion is delay inprocessing of tactile signal. Zero delay would be desirable in thetactile presentation system, still, here, the delay amount on a radiochannel is set to 10 ms at maximum. Accordingly, assuming that theprocessing delay other than header insertion is 2 ms, the header lengthitself is assumed to be ensured up to 8 ms. The amount of informationtransmittable within 8 ms changes depending on the setting of thetransmission rate of the header information. Considering that thefrequency required for the radio channel also becomes wider with theincrease in the transmission rate, the transmission rate is to be set toa rate that would achieve a frequency band approximately equal to theassumed tactile signal, with the frequency to be used here defined as 20kHz.

Meanwhile, header information for each of tactile signals is assumed toinclude three types of information, namely, presence or absence oftactile signal (on/off of mute), delay amount, and gain. Presence orabsence of a tactile signal is represented by one bit. Delay amount isrepresented by four bits, in 16 gradations. Gain is represented by threebits, in eight gradations, including amplification and attenuation. Intotal, one tactile signal is configured with eight bits.

From these settings, when the transmission rate is 20 kbps at 20 kHz,the amount of information that can be transmitted in 8 ms would becalculated as 160 bits (=20 k 8 m). This means it is possible to embed20 pieces (=160 bits/8 bits) of tactile signal information as headerinformation. That is, 20 types of tactile signals can be time-divisionmultiplexed on one radio transmission channel.

In a case where the tactile presentation system 1 handles more types oftactile signals or handles a larger amount of header information (forexample, arithmetically computing a plurality of tactile signals on thereception side, or the like), there would be a need to transmit data of160 bits or more. It is, however, not possible to increase the delaytime by inserting the header, and it is also undesirable to set theoperating frequency to be high. In such a case, although the assumptionused above is “transmission rate of 20 kbps at 20 kHz”, it is stillpossible to manage with a method of increasing the amount of informationper 1 Hz by multi-leveling the signal. In other words, transmissionrates of 40 kbps and 60 kbps can be used at 20 kHz by multi-leveling thesignal.

As described above, according to the present technology, informationindicating whether or not a tactile signal is to be used for each ofvibration units as information associated with the vibration unit thatuses a tactile signal, delay information, and gain information aredescribed in the header, and the tactile signal is time-divisionmultiplexed. This makes it possible to transmit signals with lessfrequency chs.

Note that it is also allowable to incorporate reproduction speed, pitch,the number of times of repeat (for storing and repeatedly using tactilesignals) in the header.

Furthermore, it is allowable to provide the wearer-side receptionapparatus 12 with a function capable of storing a tactile signal. Inthis case, when it is desired to simultaneously reproduce tactilesignals of the plurality of Chs of the system, it is possible topreliminarily transmit and store a tactile signal, and headerinformation can be used to simultaneously (or within a predeterminedtime difference) reproduce the received tactile signal and the storedtactile signal to enable simultaneous reproduction of the tactilesignals of the plurality of Chs.

Note that the header configuration at time-division multiplexing andtransmission of the tactile signal is not limited to the above-describedheader configuration. Next, another header configuration will bedescribed.

2. Second Embodiment

<Outline of Technology>

A technology of presenting a desired tactile sensation to a certainpoint of an area surrounded by the three vibration units 31 a to 31 c(actuators) is a psychophysical phenomenon referred as “phantomsensation”, which is a phenomenon of perceiving a stimulation in aportion between two points that have been simultaneously stimulated.This perceptual phenomenon indicates that it is difficult to fix avirtual stimulus point and it is easy to induce illusion by movingportions between the two points.

Although not limited to the technology described above, the tactilesignal is considered to include a tactile waveform wished to bepresented at an arbitrary point, not being limited to the waveform thatdrives each of the vibration units 31, as typified by theabove-described technology.

Here, there are following three methods in transmitting the tactilesignal that provides a desired tactile presentation to a certain pointof an area surrounded by the three vibration units 31 a to 31 c by usingthe above-described multiplexing method, and a header configuration ofeach of the three methods will be described.

Method (1) is a method of transmitting information of specific threevibration units 31 surrounding an area.

Method (2) is a method of transmitting information of all the vibrationunits 31 so as to enable identical tactile presentation in a pluralityof areas.

Method (3) is a method of transmitting the route information to bepresented and quoting amplitude gain corresponding to the route from areception-side table part.

FIG. 15 is a diagram illustrating Method (1). As described above, Method(1) is a method of transmitting information of the specific threevibration units 31 a to 31 c. That is, header information is generatedfor each of the three vibration units 31 and transmitted.

In the case of the example of FIG. 15, the header information needs toinclude actuator (ACT) number, an Amp gain initial value and the slopefor a group surrounding the area. That is, the header includes an ACTnumber identifying individual vibration unit as information associatedwith the vibration unit that uses the tactile signal.

The example of FIG. 15 includes illustrations of the positionalrelationship between the vibration unit 31 a to the vibration unit 31 c,and a trajectory 101 of vibration (sensation of movement of vibration).Below these are illustrated from the upper side: a waveform of thetactile signal wished to be presented transmitted from the transmissionside; ACT numbers ACT-1 to ACT-3 corresponding to the vibration units 31a to 31 c to invoke vibration as illustrated by the trajectory 101; andindividual Amp gain curves plotted with their Amp gain initial valuesand the slopes.

In addition, in the example of FIG. 15, the dotted line represents onepacket, and its length is non-uniform. As illustrated in the trajectory101, the vibration position is in the vibration unit 31 a at the head(P1) of the first packet, it is in a substantially central position ofthe vibration unit 31 a to the vibration unit 31 c at the head (P3) ofthe third packet, and it is in the vibration unit 31 c at the head (P5)of the fifth packet.

The tactile signal indicated in the waveform can vibrate the vibrationunit 31 a to the vibration unit 31 c following the three Amp gain curvesof ACT-1 to ACT-3. The vibration is performed by the vibration unit 31 ato the vibration unit 31 c (three actuators) as illustrated in thetrajectory 101 Specifically, P1 corresponds to a position where the Ampgain curve of ACT-1 is at 1 and the gain curves of ACT-2 and ACT-3 areat 0, and thus, vibration is performed in the vibration unit 31 a. P3corresponds to a position where gain curves of ACT-1 to ACT-3 are atabout 0.5, and thus, vibration is performed in an approximate centerposition of the vibration unit 31 a to the vibration unit 31 c. P5corresponds to a position where the Amp gain curve of ACT-3 is at 1, andthe gain curves of ACT-1 and ACT-2 are at 0, and thus, vibration isperformed in the vibration unit 31 c.

Note that the movement of the certain point (position of vibration)might cross areas, the group surrounding the area included in the headerinformation may have variable length, namely, four or five, even thoughthe number has been described as three in the above.

In addition, the gain is in the range of 0 to 1. When the gain exceedsthe range, clipping is performed by slope calculation.

FIG. 16 is a diagram illustrating a packet configuration example in thecase of Method (1) of FIG. 15.

In the example of FIG. 16, the packet is formed with a header, a tactilesignal, and a CRC. The header includes ACT number, the Amp gain initialvalue (Amp), and the slope, as many as the number of the vibration units31 belonging to the group surrounding the area. Note that, here, aplurality of Amp may be embedded instead of slope.

FIG. 17 is a diagram illustrating Method (2). The method (2) is a methodof transmitting information of all the vibration units 31 to the headerof one tactile signal so as to enable the identical tactile presentationin a plurality of areas. That is, the header information of each of thevibration units 31 can be freely set regardless of the headerinformation of the other vibration unit 31.

In the case of the example of FIG. 17, the header information for eachof the vibration unit 31 needs to include the presence or absence of theuse of the tactile signal, and the Amp gain initial value and the slopefor the vibration unit 31 that uses the tactile signal. That is, theheader includes information indicating whether or not to use the tactilesignal for each of the vibration units and the Amp gain initial valueand the slope for the corresponding vibration unit regardless of thenecessity (use) of the tactile signal, as information associated withthe vibration unit that uses the tactile signal.

The example of FIG. 17 includes illustrations of the positionalrelationship between the vibration unit 31 a to the vibration unit 31 c,a vibration unit 31 o, a vibration unit 31 p, and a vibration unit 31 w,and trajectories 111 and 112 of vibration (sensation of movement ofvibration). Below these are illustrated from the upper side: a waveformof the tactile signal wished to be presented transmitted from thetransmission side; ACT numbers ACT-1 to ACT-3 corresponding to thevibration units 31 a to 31 c to invoke vibration as illustrated by thetrajectory 111; and individual Amp gain curves plotted with their Ampgain initial values and slopes. Although not illustrated, ACT numberACT-15, ACT-16, and ACT-23 corresponding to the vibration unit 31 o, thevibration unit 31 p, and the vibration unit 31 w to invoke vibration asillustrated by the trajectory 112 and individual Amp gain curves plottedwith their Amp gain initial values and slope have substantially samebehavior, and thus, they are basically similar to that corresponding tothe vibration units 31 a to 31 c.

In addition, in the example of FIG. 17, the dotted line represents onepacket, and its length is non-uniform. As illustrated in the trajectory111, the vibration position is in the vibration unit 31 a at the head(P1) of the first packet, it is in a substantially central position ofthe vibration unit 31 a to the vibration unit 31 c at the head (P3) ofthe third packet, and it is in the vibration unit 31 c at the head (P5)of the fifth packet. In addition, as illustrated in the trajectory 112,the vibration position is in the vibration unit 310 at the head (P1) ofthe first packet, it is in a substantially central position of thevibration unit 31 o, the vibration unit 31 p, and the vibration unit 31w at the head (P3) of the third packet, and it is in the vibration unit31 w at the head (P5) of the fifth packet.

The tactile signal indicated in the waveform can vibrate the vibrationunit 31 a to the vibration unit 31 c following the Amp gain curves ofACT-1 to ACT-3. That is, the vibration is performed by the vibrationunit 31 a to the vibration unit 31 c as illustrated in the trajectory111. Similarly, although not illustrated, the tactile signal illustratedin the waveform can vibrate the vibration unit 31 o, the vibration unit31 p, and the vibration unit 31 w following the Amp gain curves ofACT-15, ACT-16, and ACT-23. That is, the vibration is performed by thevibration unit 31 o, the vibration unit 31 p, and the vibration unit 31w as illustrated in the trajectory 112.

FIG. 18 is a diagram illustrating a packet configuration example in thecase of Method (2) of FIG. 17.

In the example of FIG. 18, the packet is formed with a header, a tactilesignal, and a CRC. The header includes Amp gain initial value (Amp) andthe slope, as many as the number of actuators (vibration units 31). Forexample, when the tactile signal is not used, Amp and slope are set to0. In other words, when both are 0, the header is information indicatingthat the tactile signal is not used for each of vibration units, andwhen either one is not 0, it is information indicating the use of thetactile signal for each of the vibration units.

FIG. 19 is a diagram illustrating Method (3). As described above, Method(3) is a method of transmitting route information for performing“tactile presentation” and quoting amplitude gain corresponding to theroute from the reception-side table.

In the example of FIG. 19, header information needs to include actuator(ACT), group number (Gp), presentation point (position), and time. Thatis, the header includes an ACT Gp identifying individual vibration unitsas information associated with the vibration unit that uses the tactilesignal. On the reception side, it is possible to grasp which vibrationunit 31 is configured in this ACT GP.

The example of FIG. 19 illustrates the positional relationship betweenthe vibration unit 31 a and the vibration unit 31 c and a trajectory 131of the vibrations (sensation of movement of vibration).

First, in the case of the example of FIG. 19, changes in the Amp gains1, 2, and 3, specifically from 1 to G, from G to N, and from N to 3, areobtained with reference to the reception-side table. ACT GP includes “1(vibration unit 31 a), 2 (vibration unit 31 b), 3 (vibration unit 31c)”, and the like. The presentation points include a “portion from 1 toG”, “portion from G to N”, “a portion from N to 3”, and the like. Thetime includes “140 ms”, “60 ms”, “45 ms”, and the like. Note that, as apresentation point, “portion from 3 to 3” would also be possible.

FIG. 20 is a diagram illustrating a packet configuration example in thecase of Method 3 of FIG. 19.

In the example of FIG. 20, the packet is formed with a header, a tactilesignal, and a CRC. The header includes ACT GP (Gp), presentation point(Pt), and time.

Note that while the examples illustrated in FIGS. 16, 18, and 20illustrate the lengths of the headers in an equal length, actual lengthsare different from each other.

FIG. 21 is a diagram illustrating a configuration example of ademultiplexer and a signal adjustment unit of a wearable receptionapparatus in a case of Methods (1) to (3).

In the example of FIG. 21, the demultiplexer 73 includes a headeranalysis unit 151 and a gain generation unit 152.

As described above with reference to FIGS. 15, 17, and 19, the headeranalysis unit 151 analyzes the header and instructs the gain generationunit 152 as to which vibration unit 31 is to apply gain on the signal towhat degree. In the case of FIGS. 15 and 17, the gain generation unit152 generates the gain on the basis of analysis by the header analysisunit 151, and outputs the generated gain to the signal adjustment unit74. Note that the gain value also varies in one packet (header).Furthermore, the gain generation unit 152 in FIG. 19 includes a gaintable, and generates a gain with reference to the gain table on thebasis of the analysis by the header analysis unit 151, and then, outputsthe generated gain to the signal adjustment unit 74.

The signal adjustment unit 74 performs gain processing in accordancewith the gain generated by the gain generation unit 152, and outputs theprocessed signal to the vibration unit 31. Note that, although the mutefunction is omitted, it is possible to manage with the setting ofgain=“0”.

According to the present technology, information indicating whether ornot a tactile signal is to be used for each of vibration units asinformation associated with the vibration unit that uses a tactilesignal is described in the header, and the tactile signal istime-division multiplexed. This makes it possible to transmit signalswith a small number of frequency chs.

In particular, Method 1 uses same signals for the tactile signal and forthe signal waveform for driving surrounding three (plurality of)actuators, it is possible to compress the tactile signal to betransmitted to ⅓ (in the case of three actuators).

Furthermore, in Method 2, the header information of each of actuatorscan be freely set regardless of the header information of otheractuators.

Furthermore, in the case of Method 3, it is possible to make settings indetail.

Note that, although the above description assumed the receptionapparatus as a wearable apparatus, it is not limited to a wearableapparatus.

3. Third Embodiment

<Personal Computer>

A series of processing described above can be executed in hardware orwith software. In a case where the series of processing is executed withsoftware, a program included in the software is installed in a computer.Herein, the computer includes a computer incorporated in a dedicatedhardware, a general-purpose personal computer on which various types offunctions can be executed by installing various programs, and the like.

FIG. 22 is a block diagram illustrating an exemplary configuration ofhardware of a personal computer in which the series of processingdescribed above is executed by a program.

In a personal computer 500, a central processing unit (CPU) 501, a readonly memory (ROM) 502, and a random access memory (RAM) 503 areinterconnected via a bus 504.

The bus 504 is further connected with an input/output interface 505. Theinput/output interface 505 is connected with an input unit 506, anoutput unit 507, a storage unit 508, a communication unit 509, and adrive 510.

The input unit 506 includes a key board, a mouse, a microphone, and thelike. The output unit 507 includes a display, a speaker, or the like.The storage unit 508 includes a hard disk, a non-volatile memory, andthe like. The communication unit 509 includes a network interface andthe like. The drive 510 drives a removable medium 511 including amagnetic disk, an optical disk, a magneto-optical disk, a semiconductormemory, or the like.

In the personal computer 500 configured as described above, for example,the CPU 501 loads the program stored in the storage unit 508 to the RAM503 via the input/output interface 505 and the bus 504 and executes theprogram. With this configuration, the above-described series ofprocessing is performed.

The program executed by the computer (CPU 501) can be recorded andprovided in the removable medium 511. The removable medium 511 includes,for example, a package medium or the like such as a magnetic disk(including a flexible disk), an optical disk (including compactdisc-read only memory (CD-ROM), a digital versatile disc (DVD) and thelike), a magneto-optical disk, or a semiconductor memory. In addition,alternatively, the program can be provided via a wired or wirelesstransmission medium including a local area network, the Internet, anddigital satellite broadcasting.

On a computer, a program can be installed in the storage unit 508 viathe input/output interface 505, by attaching the removable medium 511 tothe drive 510. In addition, the program can be received at thecommunication unit 509 via a wired or wireless transmission medium andbe installed in the storage unit 508. Alternatively, the program can beinstalled in the ROM 502 or the storage unit 508 beforehand.

Note that the program executed by the computer may be a programprocessed in a time series in an order described in the presentdescription, or can be a program processed in parallel, or in anecessary stage such as being called.

Further, in the present description, each of the steps describing theprogram recorded on the recording medium includes not only processingperformed in time series along the described order, but also processingexecuted in parallel or separately, when it is not necessarily processedin time series.

Moreover, in the present description, a system represents an entireapparatus including a plurality of devices (apparatuses).

For example, the present disclosure can be configured as a form of cloudcomputing in which one function is shared in cooperation for processingamong a plurality of apparatuses via a network.

Alternatively, a configuration described above as a single apparatus (orprocessing unit) may be divided and configured as a plurality ofapparatuses (or processing units). Conversely, a configuration describedabove as a plurality of apparatuses (or processing units) may beintegrated and configured as a single apparatus (or processing unit). Inaddition, configurations other than the above-described configurationsmay, of course, be added to the configurations of the apparatuses (orthe processing units). Furthermore, as long as configurations oroperation are substantially the same in the entire system, theconfigurations of certain apparatuses (or processing units) may bepartially included in the configurations of the other apparatuses (orother processing units) Accordingly, the present technology are notlimited to the above-described embodiments but can be modified in avariety of ways without departing from the scope of the presenttechnology.

Hereinabove, the preferred embodiments of the present disclosure havebeen described in detail with reference to the accompanying drawings,while the present disclosure is not limited to the above examples. Aperson skilled in the art in the technical field of the presentdisclosure finds it understandable to reach various alterations andmodifications within the technical scope of the appended claims, and itshould be understood that they will naturally come within the technicalscope of the present disclosure.

Note that the present technology may also be configured as follows.

(1) A reception apparatus including:

a vibration unit that performs vibration;

a reception unit that receives a time-division multiplexed signalobtained by performing time-division multiplexing on a signal obtainedby adding a header including description of information associated witha vibration unit that uses a tactile signal including a waveform ofvibration for vibrating the vibration unit, to the tactile signal;

a separation unit that separates the tactile signal and the header fromthe time-division multiplexed signal received by the reception unit; and

a signal adjustment unit that adjusts the tactile signal separated bythe separation unit in accordance with the header separated by theseparation unit,

in which the vibration unit performs vibration based on the tactilesignal adjusted by the signal adjustment unit.

(2) The reception apparatus according to (1),

in which the information associated with the vibration unit that usesthe tactile signal is information indicating whether or not thevibration unit is to use the tactile signal for each of the vibrationunits.

(3) The reception apparatus according to (2),

in which the signal adjustment unit performs processing of muting thetactile signal separated by the separation unit in a case where theheader indicates that the vibration unit is not to use the tactilesignal.

(4) The reception apparatus according to (2),

in which the header includes description of gain information and delayinformation for each of the vibration units.

(5) The reception apparatus according to (2),

in which the header includes description of a gain initial value andslope for each of the vibration units.

(6) The reception apparatus according to (1),

in which the information associated with the vibration unit that usesthe tactile signal is information for identifying a plurality ofvibration units that uses the tactile signal.

(7) The reception apparatus according to (6),

in which the header includes description of a gain initial value andslope for each of the plurality of vibration units.

(8) The reception apparatus according to (1),

in which the information associated with the vibration unit that usesthe tactile signal is information for identifying a group including aplurality of vibration units that uses the tactile signal.

(9) The reception apparatus according to (8),

in which the header includes description of a position and time ofvibration,

the reception apparatus further includes a gain calculation unit thatanalyzes a header separated by the separation unit and refers to a tableso as to obtain a gain change between the vibration units belonging tothe group, and

the signal adjustment unit adjusts the tactile signal separated by theseparation unit in accordance with the header separated by theseparation unit and the gain change calculated by the gain calculationunit.

(10) The reception apparatus according to any of (1) to (9),

the reception apparatus being formed as a wearable apparatus to be wornby a user.

(11) A reception method including executing, by a reception apparatus:

receiving a time-division multiplexed signal obtained by performingtime-division multiplexing on a signal obtained by adding a headerincluding description of information associated with a vibration unitthat uses a tactile signal including a waveform of vibration forvibrating the vibration unit that performs vibration, to the tactilesignal;

separating the tactile signal and the header from the time-divisionmultiplexed signal received;

adjusting the separated tactile signal in accordance with the separatedheader; and

performing vibration based on the adjusted tactile signal.

(12) A program causing a computer to function as:

a reception unit that receives a time-division multiplexed signalobtained by performing time-division multiplexing on a signal obtainedby adding a header including description of information associated witha vibration unit that uses a tactile signal including a waveform ofvibration for vibrating the vibration unit that performs vibration, tothe tactile signal;

a separation unit that separates the tactile signal and the header fromthe time-division multiplexed signal received by the reception unit;

a signal adjustment unit that adjusts the tactile signal separated bythe separation unit in accordance with the header separated by theseparation unit; and

the vibration unit that performs vibration based on the tactile signaladjusted by the signal adjustment unit.

(13) A transmission apparatus including:

a tactile signal generation unit that generates a tactile signalincluding a waveform of vibration for vibrating a vibration unit;

a header generation unit that generates a header including descriptionof information associated with the vibration unit that uses the tactilesignal generated by the tactile signal generation unit;

a time-division multiplexing unit that performs time-divisionmultiplexing on the tactile signal generated by the tactile signalgeneration unit and to which the header generated by the headergeneration unit has been added; and

a transmission unit that transmits the signal time-division multiplexedby the time-division multiplexing unit.

(14) The transmission apparatus according to (13),

in which the information associated with the vibration unit that usesthe tactile signal is information indicating whether or not thevibration unit is to use the tactile signal for each of the vibrationunits.

(15) The transmission apparatus according to (14),

in which the header includes description of gain information and delayinformation for each of the vibration units.

(16) The transmission apparatus according to (13),

in which the information associated with the vibration unit that usesthe tactile signal is information for identifying a plurality ofvibration units that uses the tactile signal.

(17) The transmission apparatus according to (13),

in which the information associated with the vibration unit that usesthe tactile signal is information for identifying a group including aplurality of vibration units that uses the tactile signal.

(18) The transmission apparatus according to any of (13) to (17),

in which a reception apparatus provided with the vibration unit isformed as a wearable apparatus to be worn by a user.

(19)

A transmission method including executing, by a transmission apparatus:

generating a tactile signal including a waveform of vibration forvibrating a vibration unit;

generating a header including description of information associated withthe vibration unit that uses the generated tactile signal;

performing time-division multiplexing on the tactile signal generated bythe tactile signal generation unit and to which the header generated bythe header generation unit has been added; and

transmitting the time-division multiplexed signal.

(20) A program causing a computer to function as:

a tactile signal generation unit that generates a tactile signalincluding a waveform of vibration for vibrating a vibration unit;

a header generation unit that generates a header including descriptionof information associated with the vibration unit that uses the tactilesignal generated by the tactile signal generation unit;

a time-division multiplexing unit that performs time-divisionmultiplexing on the tactile signal generated by the tactile signalgeneration unit and to which the header generated by the headergeneration unit has been added; and

a transmission unit that transmits the signal time-division multiplexedby the time-division multiplexing unit.

REFERENCE SIGNS LIST

-   1 Tactile presentation system-   11 Transmission apparatus-   12 a to 12 o, 12 Wearable reception apparatus-   13 a to 13 o, 13 User-   14 Reception area-   21 Antenna-   31, 31-1R to 31-3R, 31-1L to 31-3L, 31-1 to 31-n, 31 a to 31 c,-   31 o, 31 p, 31 w Vibration unit-   41 Antenna-   51 Central control unit-   52 Tactile signal generation unit-   53 Header generation unit-   57 Signal coupling unit-   58 Signal transmission unit-   71 Reception unit-   72 Separation unit-   73 Demultiplexer-   74, 74-1 to 74-n Signal adjustment unit-   81 Muting unit-   82 Delay unit-   83 Gain processing unit-   101, 111, 112 Trajectory-   151 Header analysis unit-   152 Gain generation unit

The invention claimed is:
 1. A reception apparatus, comprising: avibration unit configured to vibrate; a reception unit configured toreceive a time-division multiplexed signal from an external apparatus,wherein the time-division multiplexed signal is obtained by execution oftime-division multiplexing operation on a signal obtained by addition ofa header to a tactile signal, the header includes information associatedwith the vibration unit, the information associated with the vibrationunit includes a value that indicates one of a presence of the tactilesignal or an absence of the tactile signal, and the vibration unitutilizes the tactile signal including a waveform of vibration for thevibration of the vibration unit; a separation unit configured toseparate each of the tactile signal and the header from thetime-division multiplexed signal; and a signal adjustment unitconfigured to adjust the separated tactile signal based on the separatedheader, wherein the vibration unit is configured to execute thevibration based on the adjusted tactile signal.
 2. The receptionapparatus according to claim 1, wherein the information associated withthe vibration unit that utilizes the tactile signal is informationindicating whether the vibration unit utilizes the tactile signal foreach of a plurality of vibration units.
 3. The reception apparatusaccording to claim 2, wherein the signal adjustment unit is furtherconfigured to mute the separated tactile signal based on the header, andthe header indicates that the tactile signal is unutilized by thevibration unit.
 4. The reception apparatus according to claim 2, whereinthe header further includes gain information for each of the pluralityof vibration units and delay information for each of the plurality ofvibration units.
 5. The reception apparatus according to claim 2,wherein the header further includes a gain initial value for each of theplurality of vibration units and a slope for each of the plurality ofvibration units.
 6. The reception apparatus according to claim 1,wherein the information associated with the vibration unit isinformation for identification of a plurality of vibration units thatutilizes the tactile signal.
 7. The reception apparatus according toclaim 6, wherein the header further includes a gain initial value foreach of the plurality of vibration units and slope for each of theplurality of vibration units.
 8. The reception apparatus according toclaim 1, wherein the information associated with the vibration unit isinformation for identification of a group including a plurality ofvibration units that utilizes the tactile signal.
 9. The receptionapparatus according to claim 8, wherein the header further includes aposition of the vibration and a time of the vibration, the receptionapparatus further comprises a gain calculation unit configured to:analyze the separated header; and refer to a table to calculate a gainchange between the plurality of vibration units in the group, and thesignal adjustment unit is further configured to adjust the separatedtactile signal based on the separated header and the calculated gainchange calculated.
 10. The reception apparatus according to claim 1,wherein the reception apparatus is a wearable apparatus worn by a user.11. A reception method, comprising: in a reception apparatus: receivinga time-division multiplexed signal from an external apparatus, whereinthe time-division multiplexed signal is obtained by execution oftime-division multiplexing operation on a signal obtained by addition ofa header to a tactile signal, the header includes information associatedwith a vibration unit, the information associated with the vibrationunit includes a value that indicates one of a presence of the tactilesignal or an absence of the tactile signal, and the vibration unitutilizes the tactile signal including a waveform of vibration forvibration of the vibration unit; separating each of the tactile signaland the header from the time-division multiplexed signal; adjusting theseparated tactile signal based on the separated header; and executingthe vibration of the vibration unit, based on the adjusted tactilesignal.
 12. A non-transitory computer-readable medium having storedthereon computer-executable instructions that, when executed by aprocessor of a reception apparatus, cause the processor to executeoperations, the operations comprising: receiving a time-divisionmultiplexed signal from an external apparatus, wherein the time-divisionmultiplexed signal is obtained by execution of time-divisionmultiplexing operation on a signal obtained by addition of a header to atactile signal, the header includes information associated with avibration unit; the information associated with the vibration unitincludes a value that indicates one of a presence of the tactile signalor an absence of the tactile signal, and the vibration unit utilizes thetactile signal including a waveform of vibration for vibration of thevibration unit; separating each of the tactile signal and the headerfrom the time-division multiplexed signal; adjusting the separatedtactile signal based on the separated header; and executing thevibration of the vibration unit, based on the adjusted tactile signal.